Rice-hulling machine.



No. 7o7,2,||.` f Patentedl Aug.' 19, 1902 ,.1'. B. cuRNwALL.

RICE HULLING MACHINE.

(Application led May 6, 1901.)

CNU'Model.) 2 Sheets-Sheet l.

@Vi-humus No. 707,2". s `Patented Aug. le,` |902.V`v

J. B. CORNWALL.

RICE HULLING MACHINE.

(Application filed May 6, 1901.) l

(No Model.) Y 1 2 sheetssnee 2; v

K 7 .BY Ww Y 13, 1897; and the Object of this 4inventionvis. to produce-a more simple andl'ss eXpen-.

UNITE VSTATns jPA-rnNT Omen.

JOHN B. 'OORNWALL, OF MOLINE, ILLINOIS, ASSIGNOR TO BARNARD ANDr LEAS MANUFACTURING COMPANY, OF MOLINE, ILLINOIS.

`RICE-HULLING IVIACHINE.V i

SPECIFICATION forming part of Letters Patent No. 707,211, dated August 19, 1902.

Application filed May 6, 1901. Serial No. 58.895. (No model.)

To all whom, it rita/y concern:

Be it known that 1, JOHN B. CORNWALL, of

Moline, in the county of Rock Island and Statev of Illinois, have invented certain new and useful Improvements in Rice-Hulling Machines; and I hereby declare that the following is a full, clear, and'eiact'description there-v of, reference being had tothe'accompan'yin'g;

hulling machines of 1t-he kind shownfinp'at'-,

ent to H. A. Barnard,'No.' 586,090, dated July sive machine without lessenin g the efficiente)T thereof. .11. Y.

To this end the invention-consists,- flr'st,'in

the novel construction ofthe hulling-cylinder, which is preferably made in three parts, with the hulling-ribs cast integral therewith and tapered in width to have a shear action against the hullin g plates or knives and which will enable the machine to' be usedfor a double length of time Without renewing the ribs by simply reversing the rotation of the cylinder; second, in the novel construction of the forcefeed screw, which is utilized as a support or part of the cylinder; third, in an arrangement of baffles within the casing, whereby the passage of unhulled grain through the machine is prevented; fourth, in a novel construction of parts whereby the screensor perforated plates are supported and retained in place, and,f1nally, in the general construction and combination of parts lhereinafter described and claimed.

The accompanying drawings illustrate a scourer embodying the invention, and` there- Figure 1 is a longitudinal vertical section through the complete machine. Fig. 2 is a transverse sectionon line2 2,Fig. 1.-l Fig. 3 is a detail view of the hull'i'ng-cyli'nder shell detached; Fig. 4, a View of the conveyer de' tached; Figf,Y a detail view of the screenplatesupport detached. Fig. 6 is a front elevation of the machine, the upper half of the conical casing being thrown back, showing" the taper of the ribs and their relation to the hulling-ribs II.

atits'large'r end: f v Thehulling cylinder or cone E comprises a The machine is in general form and appearance like that shown in the Barnard patent above mentioned, comprising a conical casing A, mounted on suitable standards B, upon which are journal-boxes Ofor the main shaft D,.c`arrying the hulling cylinder or cone E. 'Thecasing is dividdhorizontally', so the upper half: lAVthere'of tcanibethrown back to Efacilitate' the assembling, cleaning, or repairing of parts and'is provided with afeed-hopper Fatits small end and discharge-openings v conical shell e, openateach end and'cast with ribs Ve" on its periphery, these ribs tapering or diminishingin width from the larger toward thesmaller end of thefshellf forfjthe purpose diamet-rcally opposite sides of the cylinder,

as shown. The'taperingy of ribs prevents 'their edges coming parallel'with'the, edges of blades H, and thus produces the shear action above mentioned. y

The larger end of shell c is supported and centered on 'shaft D by bushing d, attached to the shaft and fitting Within the shell, as shown. The smaller 'end of the shell is supported and centered on the shaft by a forcefeed-screw casting I, which has'an annular shoulder fi, fitting within the shell, and said shell and feed-screw are formed with interlocking ribs and notches i2 e2, as shown, so that the shell is rotated with and by the feedscrew casting which is keyed or splinedlon the shaft D. This casting I also has aspiral flange or flanges I', by which the material is `properly forced into the casing and -fed through the machine.

When ribs e' become worn on one edge,so

that the machine does not Workzefciently,

casting I can be removed and 1replacediby,'a

similar' but oppositely'threaded f eed screw' casting and the main-shaftthen driven in the opposite directiontlius practicallyrenewing -a 's'eries'of equidi'stant proj ecting lohgitudinal the machine with little expense and doublingv its life.

The upper half of the casing may be formed ron of a single casting A' and is preferably imperforate, except for the feed and discharge openings. It is provided, however, with transverselyarranged inwardlyproject-ing semi-annular ribs o. a, which serve as baflies to prevent direct How or passage of grain through the machine and compel it to pass between the ribs e and hulling-plates I-I repeatedly. The bottom of the casing is ordinarily composed of perforated screen-plates, and, as shown, I employ two plates J J, the side edges of which are fitted under the hulling-platesH. Theirouterends aresupported on semicircular flanges Z) on the end plates or standards B of the casing, and their adjoining inner ends are supported on an inverted arch-bar casting K, which is bolted to the opposite side bars of the frame, as shown, at the center of the casing, and is the only fastening required to hold the screens .I in place. This arch is provided with a central longitudinal rib 7a on its inner face, which projects inward toward the cone and beyond the plates and, like the ribs a, forms a baflie and prevents the grain from being carried along inside the casing without passing between the hulling ribs and knives or plates. These baffles a 7u prevent unhulled grain passing through the machine from feed-openings to discharge and enables the machine to do thorough and complete hulling, allowing no unhulled rice or grain to pass to the discharge, which has not heretofore been accomplished.

The force-feed screw I is quite important to the successful operation of the machine, as the thoroughness of the hulling operation depends upon the compactness and pressure of the mass of grain passing through the machine. The principal features of novelty in the device are the separable feed-screw and shell, the bailles and the tapering ribs on the cone, and the combinations thereof. The mode of operation of the machine is substantially similar to that of the Barnard machine above referred to, and no detailed explanation thereof is necessary.

Having thus described my invention, what I therefore claim as new, and desire to secure by Letters Patent thereon, is-

l. The combination of a casing, a longitudinal hulling plate or knife, and a revoluble hulling-cylinder having tapered longitudinal hulling-ribs adapted in conjunction with the knife to effect a shear cut in either direction of revolution of the cylinder.

2. In a rice-huller, the combination of the casing, the hulling plates or knives, and hulling-cylinder provided with longitudinal tapering hulling-ribs adapted in conjunction with said plates to effect a shear cut in either direction, with transversely-disposed baffles Within the casing, substantially as described.

3. In a rice-huller, the combination of the casing, the hulling plates or knives therein, the hulling-cylinder having longitudinal tapering hulling-ribs adapted to effect a shear cut in either direction, and force-feed iianges at its feed end, all substantially as described.

4. In a rice-huller, the combination of the casing, the hulling plates or knives therein, the conical hulling-cylinder having longitudinal tapering hulling-ribs adapted to effect a shear cut in either direction, and the removable force-feed-screw casting supporting the smaller end of the cylinder upon the main shaft, all constructed and adapted to operate substantially as described.

5. In a rice-huller, the combination of the casing, the main shaft, and the hulling plates or knives at opposite sides of the casing; with the hulling-cylinder intermediate the knives having longitudinal tapered hulling ribs adapted to effect a shear cut in either direction, and transversely-disposed baflie-ribs within the casing all adapted to operate substantially as described.

6. In a rice-huller, the combination of the casing, the main shaft, and the hulling plates or knives at opposite sides of the casing, and the conical hulling-cylinder intermediate the knives having longitudinal tapered hullingribs adapted to effect a shear cut in either direction; with transversely-disposed baflles above and below the cylinder, and a forcefeed screw at the smaller end of the cylinder, all adapted to operate substantially as described.

7. In a rice-huller, the combination of the frame, the archbar suspended therefrom, having an intern al inwardly-proj ectin g bafflerib, the screen-plates having their inner ends supported by said bar; the hulling plates or knives, and the hulling-cylinder, substantially as described.

8. In a rice-huller, the combination of the frame, the arch bar suspended therefrom, having an internal inwardly-projecting bafflerib, the screen-plates having their inner ends supported by said bar; the hulling plates or knives, and the hulling-cylinder; with the removable force-feed screw on said shaft supporting and interlocked with the adjoining end of the cylinder, substantially as described.

9. In a rice-huller, the combination of the frame, the arch-bar suspended therefrom, having an internal in Wardly-projecting bafflerib, the screen-plates having their inner ends supported by said bar and the upper half of the casing having internally-projecting bailleribs; with the hulling plates or knives, the main shaft, the conical hulling-cylinder thereon having longitudinal tapered hulling-ribs, and the removable force-feed screw on said shaft supporting and interlocked with the smaller end of the cone, all constructed and adapted to operate substantially as and for the purpose described.

In testimony that I claim the foregoing as my own I aflix my signature in presence of two witnesses.

JOHN B. CORNWALL. In presence of- H. S. HANsoN, W. H. l-IILLHOUSE.

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